ML19256G220
| ML19256G220 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 12/13/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Stampley N MISSISSIPPI POWER & LIGHT CO. |
| References | |
| NUDOCS 7912280416 | |
| Download: ML19256G220 (2) | |
Text
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'o UNITED STATES NUCLEAR REGULATORY COMMISSION n
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,E REGION 11 3
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101 MARIETTA ST N.W.. SUITE 3100 I.~
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o ATLANTA, GEORGIA 30303 DEC 131979 In Reply Refer To:
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Mississippi Power and Light Company Attn:
N. L. Stampley Vice President of Production P. O. Box 1640 Jackson, Mississippi 39205 Gentlemen:
This Information Notice is provided as an early notification of a possible significant matter.
It is expected that recipients will review the information for possible applicability to their facilities. No specific action or response is requested at this time.
If further NRC evaluations so indicate, an IE Circular or Bulletin will be issued to recocmend or request specific licensee actions.
If you nave questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
Sincerely, N
\\ C' \\
(Awe-1 i ames P. O'Reilly
' rector Enclo'iiures:
1.
IE Information Notice No. 79-31 C
2.
List of IE Information Notices Recently Issued 1652 001 7912280
DEC 131979 f
Mississippi Powar and Light Company cc w/ encl:
C. K. McCoy Plant Manager Post Office Box 756 Port Gibson, Mississippi 39150 am 1652 002
4 SSINS: 6870 Accession No.:
UNITED STATES 7910250507 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 December 13, 1979 IE Information Notice No. 79-31 USE OF INCORRECT AMPLIFIED RESPONSE SPECTRA (ARS)
Description of Circumstances:
Recently, the NRC was informed that, during a review of valve weights in conjunction with the as-built review for IE Bulletin 79-14 at North Anna Unit 1, it was discovered that incorrect amplified response spectra (ARS) had been used as input to the analyses of some piping on both units 1 and 2.
The reanalyses are being per. formed by Stone & Webster (S&W), the Architect Engineer for the Virginia Electric & Power Company's facilities.
Similarly, Public Service Company of New Hampshire informed the NRC that the wrong ARS were used for the design of some containment supports at their Seabrook units. The Architect Engineer for these plants is United Engineers & Constructors (UE&C).
The NRC is currently pursuing this issue in detail with S&W and UE&C to determine the extent of the problem and the generic implications for other facilities.
This Information dotice is provided as an early notification of a possible significant matter.
It is expected that recipients will review the informa-tion for possible applicability to their facilities.
Specific action has been requested by IE Bulletin 79-14.
This bulletin requires that input to seismic analyses of piping, which includes the use of the correct ARS, be verified against the as-built condition of the plant. No specific actions are requested in response to this Information Notice.
If NRC evaluations so indicate, further licensee actions may be requested or required.
If you have any ques-tions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
No written response to this IE Information Notice is required.
1652 003
IE Information Notice No. 79-31 Enclosure December 13, 1979 RECENTLY ISSUED IE INFORMATION NOTICES Information Subject Date Issued To Notice No.
Issued 79-31 Use of Incorrect Amplified 12/13/79 All power reactor facilities Response Spectra (ARS) holding OLs and cps 79-30 Reporting of Defects and 12/6/79 All power reactor facilities Noncompliances, 10 CFR holding OLs and cps and Part 21 vendora inspected by LCVIP 79-29 Loss of NonSafety-Related 11/16/79 All power reactor facilities Reactor Coolant System holding OLs or cps Instrumentation During Operation 79-28 Overloading of Structural 11/16/79 All power reactor facilities Elements Due to Pipe Support with an OL or CP Loads 79-27 Steam Generator Tube 11/16/79 All power reactor facilities Ruptures At Two PWR holding OLs and cps Facilities79-12A Attempted Damage To New 11/9/79 All Fuel Facilities, Fuel Assemblies research reactors, and power reactors with an OL or CP 79-26 Breach of Containment 11/5/79 All power reactor facilities Integrity holding OLs and cps 79-25 Reactor Trips At Turkey 10/1/79 All power facilities with Point Units 3 And 4 an OL or a CP 79-24 Overpressurization of 10/1/79 All power reactor facilities Containment Of A PWR Plant with a CP After A Main Steam Line Break 79-23 Emergency Diesel Generator 9/26/79 All power reactor Lube Oil Coolers facilities holding OLs and cps 79 Qualification of Control 9/14/79 All power reactor Systems facilities with
'~
operating licenses and construction permits.
79-21 Transportation and Commercial 9/7/79 All power and research Burial of Radioactive Material reactors with OLs 1652 004